Solutions on the web

java.lang.ClassNotFoundException: org.ronsmits.keepassswing.KeepassJava at java.net.URLClassLoader.findClass(URLClassLoader.java:381) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) at fxlauncher.Launcher.createApplication(Launcher.java:171) at fxlauncher.Launcher.lambda$start$0(Launcher.java:70) at java.lang.Thread.run(Thread.java:745)